Section 47. The said board of commissioners shall, so far as consistent with the terms of the trusts, manage and control the same, and distribute the income in accordance with the terms of the respective trusts. The board shall keep a record of its doings, and at the close of each financial year shall make a report to the town, showing the total amount of the funds, and their investments, receipts and disbursements on account of the same, setting forth in detail the sources of the receipts and the purposes of the expenditures.